Thank you for this bug report. To properly diagnose the problem, we
need a short but complete example script to be able to reproduce
this bug ourselves. 

A proper reproducing script starts with <?php and ends with ?>,
is max. 10-20 lines long and does not require any external 
resources such as databases, etc. If the script requires a 
database to demonstrate the issue, please make sure it creates 
all necessary tables, stored procedures etc.

Please avoid embedding huge scripts into the report.

I am unable to provide a script as a real php-script is not involved here.
Associate .js-files in Apache with php as seen above and download again and again a stock .js-script of your choice, e.g. jquery.js or jquery-migrate.min.js, but it needs some thousand requests until the segfault is hit.

I haven't hit a segfault with a script having a .php-file extension, maybe it is something trivial like a file-extension check fixed to 3 digits or so summing up after some thousand hits...

I have also experienced this.  Here's my backtrace:

#0  0x00007f034cd0996d in zend_stack_push (stack=stack@entry=0x7f034d4cfca0 <compiler_globals+608>, element=element@entry=0x7f034d4cfc78 <compiler_globals+568>, size=size@entry=40) at /build/buildd/php5-5.5.9+dfsg/Zend/zend_stack.c:42
No locals.
#1  0x00007f034ccd530e in compile_file (file_handle=file_handle@entry=0x7fff94794c10, type=2) at Zend/zend_language_scanner.l:586
        original_lex_state = {yy_leng = 0, yy_start = 0x0, yy_text = 0x0, yy_cursor = 0x0, yy_marker = 0x0, yy_limit = 0x0, yy_state = 0, state_stack = {top = 0, max = 0, elements = 0x0}, heredoc_label_stack = {top = 0, max = 0,
            elements = 0x0, top_element = 0x0, persistent = 0 '\000'}, in = 0x0, lineno = 0, filename = 0x0, script_org = 0x0, script_org_size = 0, script_filtered = 0x0, script_filtered_size = 0, input_filter = 0x0,
          output_filter = 0x0, script_encoding = 0x0}
        op_array = 0x7f0350d40040
        original_active_op_array = 0x0
        retval = 0x7f0350d40040
        compiler_result = <optimized out>
        compilation_successful = 0 '\000'
        retval_znode = {op_type = 1, u = {op = {constant = 1, var = 1, num = 1, hash = 1, opline_num = 1, jmp_addr = 0x1, zv = 0x1, literal = 0x1, ptr = 0x1}, constant = {value = {lval = 1, dval = 4.9406564584124654e-324, str = {
                  val = 0x1 <error: Cannot access memory at address 0x1>, len = 1355599370}, ht = 0x1, obj = {handle = 1, handlers = 0x7f0350ccce0a}}, refcount__gc = 1, type = 1 '\001', is_ref__gc = 0 '\000'}, op_array = 0x1},
          EA = 1352782496}
        original_in_compilation = 0 '\000'
#2  0x00007f034ccfaaea in dtrace_compile_file (file_handle=0x7fff94794c10, type=<optimized out>) at /build/buildd/php5-5.5.9+dfsg/Zend/zend_dtrace.c:40
        res = 0x7f0350d41218
#3  0x00007f034cb83cb4 in phar_compile_file (file_handle=<optimized out>, type=<optimized out>) at /build/buildd/php5-5.5.9+dfsg/ext/phar/phar.c:3383
        __orig_bailout = 0x7fff94794c90
        __bailout = {{__jmpbuf = {139652217134240, 1560366938000916389, 140735684365136, 140735684365328, 139652158519872, 0, -1560319682279440475, -1467874381389299803}, __mask_was_saved = 0, __saved_mask = {__val = {139652217126952,
                0, 0, 139652217132542, 139652217128344, 139652217127072, 9, 139652217128728, 139652209727463, 139652219264008, 206158430232, 140735684365152, 140735684364960, 139652217228296, 140735684365056, 80}}}}
        res = <optimized out>
        name = 0x0
        failed = 0
        phar = 0x7f0350cb4028
#4  0x00007f034cd0c56f in zend_execute_scripts (type=type@entry=2, retval=retval@entry=0x0, file_count=file_count@entry=1) at /build/buildd/php5-5.5.9+dfsg/Zend/zend.c:1308
        files = {{gp_offset = 32, fp_offset = 32515, overflow_arg_area = 0x7fff94794be0, reg_save_area = 0x7fff94794b70}}
        i = 0
        file_handle = 0x7fff94794c10
        orig_op_array = 0x0
        orig_retval_ptr_ptr = 0x0
        orig_interactive = 0
#5  0x00007f034cdbc4ed in php_handler (r=<optimized out>) at /build/buildd/php5-5.5.9+dfsg/sapi/apache2handler/sapi_apache2.c:669
        zfd = {type = ZEND_HANDLE_MAPPED, filename = 0x7f0350cb5ca0 "/var/www/html/site_details_removed/js/stumble.js.php",
          opened_path = 0x7f0350d401a8 "/var/www/html/site_details_removed/js/stumble.js.php", handle = {fd = 1356071640, fp = 0x7f0350d402d8, stream = {handle = 0x7f0350d402d8, isatty = 0, mmap = {len = 309,
                pos = 0, map = 0x0, buf = 0x7f0350cb8000 <error: Cannot access memory at address 0x7f0350cb8000>, old_handle = 0x0, old_closer = 0x0}, reader = 0x7f034ccc24d0 <_php_stream_read>,
              fsizer = 0x7f034cca8cd0 <php_zend_stream_fsizer>, closer = 0x7f034cca8cb0 <php_zend_stream_mmap_closer>}}, free_filename = 0 '\000'}
        __orig_bailout = 0x0
        __bailout = {{__jmpbuf = {139652217127072, 1560366938000654245, 139652217127072, 139652221501312, 0, 139652217270928, -1560319682222817371, -1467873582333755483}, __mask_was_saved = 0, __saved_mask = {__val = {139652218377176,
                139652218107936, 139652217229512, 1, 139652218107936, 139652217229520, 139652217270432, 139652221501312, 0, 139652217270928, 139652164910243, 139652217134314, 2, 139652217229520, 139652217127072, 139652217988304}}}}
        ctx = 0x7f0350cbced8
        conf = <optimized out>
        brigade = 0x7f0350cb6620
        bucket = <optimized out>
        rv = <optimized out>
        parent_req = 0x7f0350cb90a0
#6  0x00007f0350e9b680 in ap_run_handler (r=0x7f0350cb40a0) at config.c:169
        pHook = 0x7f0350d864f8
        n = 2
        rv = 1356075544
#7  0x00007f0350e9bbc9 in ap_invoke_handler (r=r@entry=0x7f0350cb40a0) at config.c:439
        handler = <optimized out>
        p = <optimized out>
        result = <optimized out>
        old_handler = 0x7f0350d98828 "application/x-httpd-php"
        ignore = <optimized out>
#8  0x00007f0350eb116a in ap_process_async_request (r=0x7f0350cb40a0) at http_request.c:317
        access_status = 0
#9  0x00007f0350eb1444 in ap_process_request (r=r@entry=0x7f0350cb40a0) at http_request.c:363
        bb = <optimized out>
        b = <optimized out>
        c = 0x7f0350cd7290
        rv = <optimized out>
#10 0x00007f0350eadf02 in ap_process_http_sync_connection (c=0x7f0350cd7290) at http_core.c:190
        r = 0x7f0350cb40a0
        cs = 0x0
        csd = 0x7f0350cd70a0
        mpm_state = 1
#11 ap_process_http_connection (c=0x7f0350cd7290) at http_core.c:231
No locals.
#12 0x00007f0350ea4cc0 in ap_run_process_connection (c=0x7f0350cd7290) at connection.c:41
        pHook = 0x7f0350d86a40
        n = 0
        rv = 1356075544
#13 0x00007f0350ea50a8 in ap_process_connection (c=c@entry=0x7f0350cd7290, csd=<optimized out>) at connection.c:202
        rc = <optimized out>
#14 0x00007f034d6dc767 in child_main (child_num_arg=child_num_arg@entry=30) at prefork.c:704
        current_conn = 0x7f0350cd7290
        csd = 0x7f0350cd70a0
        thd = 0x7f0350cd90a0
        osthd = 139652218701696
        ptrans = 0x7f0350cd7028
        allocator = 0x7f035186d4b0
        status = <optimized out>
        i = <optimized out>
        lr = <optimized out>
        pollset = 0x7f0350cd9158
        sbh = 0x7f0350cd9150
        bucket_alloc = 0x7f0350cd3028
        last_poll_idx = 0
        lockfile = <optimized out>
#15 0x00007f034d6dc9a6 in make_child (s=0x7f0350e0ade0, slot=30) at prefork.c:800
        pid = 0
#16 0x00007f034d6dd60e in perform_idle_server_maintenance (p=<optimized out>) at prefork.c:902
        i = <optimized out>
        idle_count = <optimized out>
        ws = <optimized out>
        free_length = <optimized out>
        free_slots = {28, 30, 34, 35, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65}
        last_non_dead = <optimized out>
        total_non_dead = <optimized out>
#17 prefork_run (_pconf=<optimized out>, plog=<optimized out>, s=<optimized out>) at prefork.c:1090
        status = 0
        pid = {pid = -1, in = 0x7f0350ebc048, out = 0xa, err = 0x7f035059aff6}
        child_slot = <optimized out>
        exitwhy = APR_PROC_EXIT
        processed_status = <optimized out>
        index = <optimized out>
        remaining_children_to_start = 0
        rv = <optimized out>
#18 0x00007f0350e8269e in ap_run_mpm (pconf=0x7f0350e32028, plog=0x7f0350e06028, s=0x7f0350e0ade0) at mpm_common.c:96
        pHook = 0x7f0350d86da8
        n = 0
        rv = 1356075544
#19 0x00007f0350e7be36 in main (argc=3, argv=0x7fff94795318) at main.c:777
        c = 0 '\000'
        showcompile = 0
        showdirectives = 0
        confname = 0x7f0350ebb607 "apache2.conf"
        def_server_root = 0x7f0350ebb5fa "/etc/apache2"
        temp_error_log = 0x0
        error = <optimized out>
        process = 0x7f0350e3a118
        pconf = 0x7f0350e32028
        plog = 0x7f0350e06028
        ptemp = 0x7f0350e08028
        pcommands = 0x7f0350e10028
        opt = 0x7f0350e10118
        rv = <optimized out>
        mod = 0x7f03510dd160 <ap_prelinked_modules+64>
        opt_arg = 0x7f0350e3a028 "(\340\343P\003\177"
        signal_server = <optimized out>



Additionally, here's the script that is causing the error:

<?php
header('Content-type: text/javascript');
?>
function bfb_doStumbleShare(url)
{
	window.open(
		'http://www.stumbleupon.com/submit?'+
			'url='+url,
		'sharer',
		'top=' + (screen.height/2 - 160).toString() + ',left=' + (screen.width/2 - 290).toString() + ',toolbar=0,status=0,width=580,height=325'
	);
}

No feedback was provided. The bug is being suspended because
we assume that you are no longer experiencing the problem.
If this is not the case and you are able to provide the
information that was requested earlier, please do so and
change the status of the bug back to "Re-Opened". Thank you.

We are also seeing the same issue.  You have stated that there was "No Feedback", despite other people confirming the issue.  What feedback do you require to reopen and address the issue?  For reference, it is happening on our Ubuntu 14.04 LTS with PHP 5.5.9, Apache 2.4.7.

Reopened — the "No Feedback" update is a bot which can get confused if feedback is provided but the status isn't updated.

Does this issue still occur on any of the actively supported PHP
versions[1]?

<https://www.php.net/supported-versions.php>

No feedback was provided. The bug is being suspended because
we assume that you are no longer experiencing the problem.
If this is not the case and you are able to provide the
information that was requested earlier, please do so and
change the status of the bug back to "Re-Opened". Thank you.