Closed Bug 1002741 Opened 10 years ago Closed 6 years ago

Give nicer error when trying to use 'let' in Web content

Categories

(Core :: JavaScript Engine, defect)

Product:
Core
Component:
JavaScript Engine
Type:
defect
Priority:
Not set
Severity:
normal

Tracking

()

Status:
RESOLVED WORKSFORME

People

(Reporter: botond, Unassigned)

References

Details

I just tried to use 'let' in a plain mochitest, without realizing that it is a new language feature that's not available yet by default.

The error I got was:

TEST-UNEXPECTED-FAIL | unknown test url | uncaught exception - SyntaxError: missing ; before statement at http://mochi.test:8888/tests/gfx/layers/apz/test/test_bug982141.html?autorun=1&closeWhenDone=1&logFile=%2Fdata%2Flocal%2Ftests%2Flog%2Fmochitest.log&fileLevel=INFO&consoleLevel=INFO&hideResultsTable=1&dumpOutputDirectory=%2Ftmp:15
JavaScript error: http://mochi.test:8888/tests/gfx/layers/apz/test/test_bug982141.html?autorun=1&closeWhenDone=1&logFile=%2Fdata%2Flocal%2Ftests%2Flog%2Fmochitest.log&fileLevel=INFO&consoleLevel=INFO&hideResultsTable=1&dumpOutputDirectory=%2Ftmp, line 15: missing ; before statement

I think we could give a more helpful error in a situation like this.
Summary: Give nicer error when trying to use 'let' in plain mochitest → Give nicer error when trying to use 'let' in Web content
OS: Linux → All
Hardware: x86_64 → All
Depends on: 855665
Resolving as WFM because |let| is now enabled by default.
Status: NEW → RESOLVED
Closed: 6 years ago
Resolution: --- → WORKSFORME
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